Mix the saffron threat with the hot stock and set aside.
2
Heat up the butter in a large stockpot and sauté the onions and leeks with a pinch of salt until translucent. Add the red pepper flakes, bay leaf and thyme sprigs.
3
Add the mussels to the pot, give it a stir then add the wine. Cook until the alcohol has evaporated then pour in the saffron infused stock.
4
Bring to a gentle simmer, cover with a lid and cook for about 20 minutes until all the clams have opened. Add the cream and let the soup simmer a couple more minutes.